Title: Monolithic Expandable-FOV Metalens Enabled by Radially Gradient-Tilted Meta-Atoms Show Chinese title

Title: 单片可扩展视场金属透镜由径向梯度倾斜超原子实现

Abstract: Metalens, as the most promising and applicable emerging optical device, has long been constrained by the limited field of view (FOV). Recent studies employing phase engineering or multi-layer strategies have made some progress, but they all rely on upright meta-atoms. This leads us to consider whether tilted meta-atoms could represent a promising yet underexplored approach for enhancing the field of view? In this work, we introduce the control of the tilt angle of meta-atoms as a new degree of freedom into the design of metalenses and propose a wide-field-of-view (WFOV) metalens design framework utilizing radially gradient-tilted meta-atoms. Based on the proposed method, we designed two WFOV metalenses with distinct tilt configurations to meet specific application requirements of efficiency or precision. Simulation results demonstrate that both designs, exhibiting distinct performance characteristics, achieve diffraction-limited focusing within a 120 degree FOV. Additionally, the FOV can be expanded with this method by tuning the tilt angle configurations of meta-atoms and the metalens diameter. These findings will establish a promising pathway towards compact optical systems capable of combining ultra-wide angular coverage with high-resolution imaging. Show Chinese abstract

Abstract: 金属透镜作为最有前途和应用前景的新兴光学器件，长期以来受到视场角（FOV）有限的限制。 最近的研究采用相位工程或多层策略取得了一些进展，但它们都依赖于直立的超原子。 这使我们考虑倾斜的超原子是否可能代表一种有前景 yet 未被充分探索的方法，用于增强视场角？ 在本工作中，我们将超原子的倾斜角度控制引入金属透镜的设计中，并提出了一种利用径向梯度倾斜超原子的宽视场角（WFOV）金属透镜设计框架。 基于所提出的方法，我们设计了两种具有不同倾斜配置的WFOV金属透镜，以满足效率或精度的特定应用需求。 仿真结果表明，这两种设计表现出不同的性能特点，在120度视场角内实现了衍射极限聚焦。 此外，通过调整超原子的倾斜角度配置和金属透镜直径，可以扩展视场角。 这些发现将为紧凑的光学系统建立一条有前景的路径，这些系统能够结合超宽视角覆盖与高分辨率成像。